得失球差，又称“净胜球”。当体育运动竞赛（特别是球类项目如足球、冰球等）在积分相同时的第一重分胜负方法：将入球数减失球数，以差数较高的队伍为胜者。

Goal difference or points difference is a form of tiebreaker used to rank sport teams which finish on equal points in a league competition. Either "goal difference" or "points difference" is used, depending on whether matches are scored by goals (as in ice hockey and association football) or by points (as in rugby union and basketball).